WO2023088818A1 - Accumulateur d'énergie, procédé de fabrication d'un accumulateur d'énergie et véhicule - Google Patents

Accumulateur d'énergie, procédé de fabrication d'un accumulateur d'énergie et véhicule Download PDF

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Publication number
WO2023088818A1
WO2023088818A1 PCT/EP2022/081710 EP2022081710W WO2023088818A1 WO 2023088818 A1 WO2023088818 A1 WO 2023088818A1 EP 2022081710 W EP2022081710 W EP 2022081710W WO 2023088818 A1 WO2023088818 A1 WO 2023088818A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical connection
connection element
energy store
circuit board
advantageously
Prior art date
Application number
PCT/EP2022/081710
Other languages
German (de)
English (en)
Inventor
Bastian BLÖMEKE
Steffen Rosenkranz
Original Assignee
HELLA GmbH & Co. KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HELLA GmbH & Co. KGaA filed Critical HELLA GmbH & Co. KGaA
Priority to CN202280076223.9A priority Critical patent/CN118251792A/zh
Publication of WO2023088818A1 publication Critical patent/WO2023088818A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • a material connection is disadvantageous, particularly in the case of electrical connection elements made of aluminum, because soldering or welding to connect aluminum is often brittle. This means a disadvantageous quality of such an energy store.
  • Welding methods in particular laser welding methods, have recently been used to connect connection elements of battery cells to one another, as disclosed in DE 10 2019 127 703 A1.
  • connection elements of battery cells have been connected to one another, as disclosed in DE 10 2019 127 703 A1.
  • the object of the invention is to ensure the energy supply of a vehicle with such an improved energy store in a simple manner.
  • the object is achieved with an energy store according to claim 1.
  • the object is also achieved by a method for producing an energy store according to claim 9.
  • the object is achieved by using the energy store described here in a vehicle according to claim 11.
  • the energy store is in particular a battery for a vehicle.
  • the battery storage device has one or more battery cells and a printed circuit board, the printed circuit board having a first electrical connection element or the printed circuit board being permanently connected to a first electrical connection element, at least one of the battery cells having a second electrical connection element, the first electrical
  • the connection element and the second electrical connection element are designed and arranged in such a way that the electrical connection elements form a non-positive electrical connection in an unconnected state in one area, in particular by touching, with the electrical connection being materially bonded in some areas by a welding process, in particular by a laser welding process.
  • the first electrical connection element and the second electrical connection element are preferably made of different metals. Next is beneficial the first electrical connection element is connected to the printed circuit board by a soldered connection. In addition, the first electrical connection element can be fastened with the aid of a clamp connection.
  • the invention can be used to advantage in particular in the case of first and second electrical connection elements in which “classic” welding is difficult.
  • the first and second electrical connection elements are advantageously welded at a point or area that touches one another, for example at the respective side end of the respective electrical connection element.
  • the second electrical connection element is advantageously designed as a contact element of the battery cell.
  • the respective first or second electrical connection element can advantageously be connectable to a current sensor, for example a shunt resistor.
  • the first and/or the second electrical connection elements are/are advantageously designed as sheet metal.
  • the battery cells are advantageously designed as pouch cells.
  • Pouch cells often include electrical connection elements made of aluminum that are formed as sheet metal, which is why the invention is particularly well suited for connecting pouch cells to an electrical connection element of the printed circuit board.
  • the respective battery cell can advantageously also be designed as a cylinder or as a prismatic battery cell. Cylindrical battery cells can advantageously form a stable arrangement in a frame.
  • the energy store preferably includes a plurality of battery cells which are arranged in a stacked manner. Due to the stacked arrangement, the respective second electrical connectors of the battery cells are formed in parallel.
  • the printed circuit board is preferably designed as a printed circuit board (PCB).
  • a battery management system (BMS) and a further controller for the energy store are preferably applied to the printed circuit board.
  • sensors such as a shunt resistor or a temperature sensor can be applied and/or attached to the printed circuit board.
  • a non-positive connection of the two electrical connectors is advantageously formed in that the respective electrical connection element is shaped in such a way that one area of the connection elements "press against one another" after the mechanical assembly of the energy store in the area or at least touch in the area. Such an assembly is also referred to as pre-assembly.
  • the electrical connection elements can form a materially bonded connection in the area with the aid of fusion welding.
  • the non-positive connection of the electrical connection elements advantageously results from an elastic material tension of the respective electrical connection element.
  • At least one electrical connection element is preferably designed to be elastic in some areas.
  • the elasticity or the elastic area is formed in such a way that the respective connecting element is formed from sheet metal, at least in some areas.
  • the integral connection of the electrical connection elements can advantageously be combined with a latching connection.
  • At least the first electrical connection element can advantageously be in thermal contact with a heat sink or have a heat sink. For example, heat from the battery cell can be better released to the environment through the heat sink. It is also advantageous that the respective electrical connection element has slots or recesses.
  • the respective electrical connection elements which are connected to one another in a materially bonded manner in some areas, preferably include slots or recesses in the same position.
  • the electrical connection elements form a common edge in the area due to an at least essentially matching outer shape of the corresponding electrical connection elements.
  • the electrical connection elements are preferably welded at the edge. Due to the slots and/or recesses on the corresponding connection elements, the edge of the respective electrical connection element is advantageously formed with a great length. This can result in a better material connection through a longer weld seam at the respective edges.
  • the electrical connection elements are advantageously designed in such a way that electrical connection elements are designed at least in the overlapping area in such a way that the edges of the electrical connection elements overlap in certain areas.
  • connection elements disclosed here are also referred to as pole connections.
  • the respective connection element is advantageously designed with a tongue-shaped section, with at least the respective tips of the tongues advantageously being welded to one another.
  • a cohesive electrical connection of the two electrical connectors advantageously takes place with the aid of laser welding in the respective area in which the electrical connection elements have been brought together essentially in a form-fitting manner through the arrangement.
  • Laser welding is a particularly advantageous method that can be used to form a well-conducting electrical connection between electrical connection elements, in particular if the respective electrical connection element is made of different materials such as copper, iron and/or aluminum.
  • the respective electrical connection element be formed at least essentially from zinc or from lead. So-called base alloys of copper, aluminum or iron can also advantageously serve as material for the respective electrical connection element.
  • the electrical connection elements are preferably designed to be congruent, at least in the area.
  • the electrical connectors preferably converge in areas and preferably overlap in the area in a form-fitting manner.
  • the electrical connection elements are preferably welded together in the area in which the electrical connection elements are designed to be congruent or touch one another in the not yet welded state.
  • the energy store can also be designed as a battery for a solar system or as a fuel cell store or as an energy store for wind power plants.
  • the form-fitting connection of the two electrical connection elements advantageously allows the energy store to be produced quickly and easily.
  • the form-fitting connection is advantageously made without an auxiliary device for positioning and/or for fixing the electrical connection elements.
  • the electrical connection elements are advantageously designed as joining partners. Elaborate screw connections for the electrical connection of the printed circuit board and the at least one battery cell can be omitted as a result.
  • the first electrical connector is made of copper or an alloy containing copper, in particular a copper-based alloy
  • the second electrical connector is made of aluminum or an alloy containing aluminum, in particular an aluminum-based alloy
  • the first electrical connector can also be formed at least essentially from a ferrous material such as stainless steel or an iron-based alloy. Ferrous materials advantageously have high strength. In addition, ferrous materials are easy to process, especially through shaping processes such as pressing or forging.
  • the second electrical connection element can also comprise an iron-containing material such as (stainless) steel, at least in some areas. #
  • the first electrical connection element can advantageously be made of iron or an iron-based alloy if the respective second electrical connection element consists at least largely of copper or a copper-based alloy.
  • the second electrical connection element which is assigned to the battery cell, is advantageously made of aluminum. This is often the case with Li-ion battery cells in particular. Aluminum is advantageously light, easy to process and has high electrical conductivity.
  • the first electrical connection element is advantageously fastened to the printed circuit board with the aid of a soldered connection.
  • the soldered connection advantageously results in an electrical connection to a conductor track on the printed circuit board.
  • a particularly simple and stable electrical and mechanical connection of the printed circuit board to the first electrical connector can be formed by a soldered connection.
  • the first electrical connection element can enter into a fixed mechanical and/or electrical connection with the printed circuit board using a press-in method.
  • the respective second electrical connection element of the respective battery cell is often made of aluminum or an aluminum-containing alloy, in particular an aluminum-based alloy. Therefore, the electrical connection elements of a battery cell that are already present can be advantageously used directly for connection to the (first) electrical connection element of the printed circuit board.
  • the respective battery cell is advantageously designed as a lithium-ion battery cell.
  • lead cells can serve as battery cells. In particular, battery cells based on sodium ions or on graphene can be used.
  • the different materials such as aluminium, iron or aluminium, in particular their respective base alloys, of the electrical connection elements can be connected to one another simply and securely using a laser welding process in particular.
  • the first electrical connection element and the second electrical connection element are materially connected by a laser welding process.
  • connection takes place particularly advantageously at the edges of electrical connection elements which are arranged in an overlapping manner.
  • recesses such as holes can be introduced in the overlapping area of the respective electrical connection element, with the electrical connection elements being welded to one another on the respective inside of the recesses.
  • the use of the laser welding method allows the creation of the electrical connection of the electrical connection elements to be monitored particularly well, for example with the aid of optical monitoring.
  • so-called welding spatter can be effectively prevented. Damage to the battery cell connected to the printed circuit board is effectively prevented in a particularly advantageous manner.
  • the avoidance of brittle areas is greatly reduced.
  • the first electrical connection element is in direct thermal contact with a temperature sensor.
  • the temperature sensor is preferably designed to determine the temperature of the battery cell, which is attached to the circuit board directly via the electrical connection elements.
  • the temperature sensor is advantageously fastened directly to the printed circuit board with the aid of a soldered connection.
  • a cable-based electrical connection of the temperature sensor is not necessary in this case. This contributes in particular to improved production of the energy store.
  • the temperature sensor is preferably designed as a temperature-dependent resistor, in particular as a PTC or NTC.
  • the temperature sensor is advantageously attached directly to the printed circuit board.
  • the temperature sensor is advantageously in direct thermal contact with the first electrical connector.
  • a thermally conductive paste between the temperature sensor and the first electrical connection element is advantageously used to improve the thermal connection.
  • the temperature sensor is attached to the first electrical connection element.
  • the welded connection of the two electrical connection elements to one another ensures a good thermal connection of the electrical connection elements and thus a good thermal connection between the respective battery cell and the printed circuit board.
  • the temperature of the battery cell can be determined by a temperature sensor that is attached to the printed circuit board. In this way, further temperature sensors on the at least one battery cell can be saved. In a further advantageous embodiment of the invention, the temperature sensor is arranged on the printed circuit board.
  • the temperature sensor is preferably attached directly to the printed circuit board, for example with a soldered connection or a press-in connection.
  • the temperature sensor is advantageous at least in the immediate vicinity of or in direct contact with the first electrical connection element.
  • a mechanical (press) connection of the temperature sensor to the first electrical connection element preferably also takes place.
  • the temperature sensor is advantageously positioned in an opening or a recess in the first electrical connector.
  • the first and/or the second electrical connection element each has at least one area that converges, with the integral connection being positioned in the respective area that converges.
  • a tapering area can be formed by edges that narrow towards one another or by edges of the respective electrical connection element that converge. Such an area is preferably designed in the shape of a tongue.
  • a tongue-shaped area is understood to mean, in particular, a trapezoidal area rounded off at the top.
  • the area that converges in each case can be formed by essentially triangular recesses on the sides of the area in question. The corners or edges created by the recesses are advantageously rounded.
  • the respective electrical connection element advantageously has a plurality of such converging areas on at least one end or on one side of the electrical connection element.
  • the corners and/or edges of the respective electrical connection element are rounded, so that any electrical potential peaks that may occur are avoided.
  • the respective area is particularly advantageously designed to be triangular or trapezoidal, with the edge of the respective electrical connection element having a rounded shape.
  • the energy store has at least two battery cells, with each battery cell having two second electrical connection elements, with the respective second connection elements of the battery cells being connected to one another using a laser welding process.
  • the second electrical connection elements form a materially bonded connection with one another as a result of the welding process.
  • the integral connection advantageously results in a thermal connection between the battery cells and particularly advantageously with the temperature sensor.
  • the energy store advantageously includes a plurality of battery cells which are electrically connected in series.
  • the battery cells are electrically connected by means of an electrical connection between two connection elements in each case.
  • the respective second electrical connection elements are particularly advantageously made of aluminum or of an aluminum-based alloy, so that the electrical connection elements enter into a stable and form-fitting connection with one another by means of a welding process.
  • the battery cells are advantageously designed as so-called pouch cells.
  • the battery cells are embodied as cylindrical or prismatic battery cells, it being possible for the battery cells to have connection lugs which are embodied as second electrical connection elements.
  • the second connection elements are advantageously made at least essentially from copper or a copper-based alloy.
  • connection lugs of the respective battery cell can be welded directly to the respective first electrical connection element.
  • the energy store can be produced in a particularly simple and cost-effective manner.
  • the second electrical connection elements have areas that converge, the second electrical connection elements being connected in a material-to-material and/or form-fitting manner in the areas that converge.
  • the respective second electrical connection elements are preferably connected using a welding process, in particular a laser welding process.
  • the method for producing an energy store according to the above description comprises at least the following steps:
  • the method further includes attachment of the first electrical connection element to the printed circuit board, preferably with the aid of a soldered connection.
  • the first electrical connection element can also be fastened to the printed circuit board by a (press-fit) connection.
  • the electrical connection elements in the area are connected using the welding process.
  • the electrical connection elements are connected in the area that is tapering, in particular trapezoidal or tongue-shaped.
  • the connection is advantageously made at the respective edge of the electrical connection elements arranged one on top of the other.
  • the integral connection can advantageously be improved in that a connection of the respective electrical connection element is or is formed within the area with the aid of laser welding.
  • the method described above can be used to provide a particularly simple, quick and, moreover, robust connection of a circuit board to at least one battery cell. As a result, an energy store can be produced in an improved manner.
  • a temperature sensor is attached to the printed circuit board or to the first electrical connection element in such a way that a thermal connection is created between the temperature sensor and the first electrical connection element.
  • the temperature sensor is advantageously attached to the printed circuit board after the first connection element has been attached to the printed circuit board.
  • the thermal connection of the temperature sensor to the first electrical connection element is then improved, advantageously with the aid of a press connection and/or a thermally conductive paste.
  • the temperature sensor can be attached to the printed circuit board in a first step and the first electrical connection element can be attached to the printed circuit board in a second step.
  • the first electrical connection element is fastened, there is a direct thermal connection of the temperature sensor to the first electrical connection element.
  • the temperature sensor can advantageously be positioned in a recess in the printed circuit board and/or in a recess in the first electrical connection element.
  • the direct thermal connection with the aid of a press connection and/or a thermally conductive paste is advantageous.
  • the vehicle includes at least one energy store as described above.
  • the vehicle can be in the form of a motor vehicle, an electrically operated road vehicle, preferably an automobile, or a rail vehicle.
  • the energy store described here can also be provided in the field of wind power or for temporarily storing solar energy.
  • the energy store can also be used with a fuel cell.
  • the invention relates to an energy store, a method for producing such an energy store and a vehicle with such an energy store.
  • the energy store comprises at least one battery cell and a circuit board, the circuit board advantageously being provided as part of a battery management system and/or for the electrical connection of the at least one battery cell to external connections of the energy store.
  • the printed circuit board comprises at least a first electrical connection element, advantageously in the form of a copper bar or trained as copper bleach.
  • the respective battery cell comprises at least one second connection element, usually in the form of an aluminum sheet or an aluminum rail.
  • a welding process in particular a laser welding process, is used to connect the two electrical connection elements.
  • a temperature sensor is advantageously in direct thermal contact with the first electrical connection element. The temperature sensor can advantageously determine a temperature of the at least one battery cell
  • FIG. 1 shows a battery cell and a printed circuit board, which are connected via electrical connection elements
  • FIG. 2 shows part of an exemplary electrical connection element
  • FIG. 3 shows an exemplary energy store in a vehicle
  • the battery cell 7 and the circuit board 5 are part of an energy store 1 (not shown separately).
  • the first electrical connection element 3a is electrically connected to the circuit board 5 .
  • the electrical connection of the printed circuit board 5 to the first electrical connection element 3a is formed by a soldered connection 10, as shown here by way of example.
  • the printed circuit board 5 and the first electrical connection element 3a can advantageously also be connected to one another by a press-in method.
  • the first electrical connection element 3a is advantageously made of copper or a copper Base alloy formed.
  • the first electrical connection element 3a can be made of an iron-containing material, for example stainless steel.
  • the first electrical connection element 3a is shown overlapping in a region 11 with a second electrical connection element 3b.
  • the first electrical connection element 3a and the second electrical connection element 3b are advantageously arranged congruently or at least essentially overlapping in the area 11 .
  • the electrical connectors are connected to one another in a cohesive manner using a welding process, in particular a laser welding process.
  • the integral connection is advantageously made by (laser) welding at the respective edge of the electrical connection
  • the second electrical connection element 3b is connected to the battery cell 7 .
  • the second electrical connection element is designed as an aluminum sheet.
  • a highly conductive and durable connection of metals of the same type such as aluminium, iron and copper (and their base alloys) is particularly possible using welding processes, in particular the laser welding process.
  • the electrical connection elements 3a, 3b or the printed circuit board 5 and the battery cell 7 are advantageously positioned and aligned in such a way that the electrical connection elements 3a, 3b overlap one another in such a way that the respective overlapping edge of the electrical connection elements 3a, 3b is sufficient represents a stable attachment and electrically and/or thermally sufficient conductive connection.
  • Such a possibility is described by way of example in FIG. 2 below.
  • a temperature sensor 9 is positioned on one side of the circuit board 5 .
  • the temperature sensor 9 is advantageously attached to the circuit board 5 .
  • the temperature sensor 9 is advantageously in direct thermal contact with the first electrical connection element 3a.
  • the temperature sensor 9 advantageously touches the first electrical connection element 3a. Due to the integral connection of the first and the second electrical connection element 3a, 3b, an at least indirect thermal contact is formed between the battery cell 7 and the temperature sensor 9.
  • the temperature sensor 9 can also be arranged directly on the first electrical connection element 3a.
  • the temperature sensor 9 can be positioned in a recess or opening in the first electrical connection element 3a and/or the circuit board 5 .
  • the temperature sensor 9 can be connected particularly easily to the electronic components on the printed circuit board 5, in particular a battery management system.
  • the temperature of the battery cell 7 can thus be determined with the aid of the temperature sensor 9 . In this way, at least one complex wiring of a temperature sensor 9 on the battery cell 7 can be saved.
  • the electrical connection element 3a, 3b comprises a plurality of cutouts 14, with each two adjacent cutouts 14 forming a section that converges, in particular a (rounded) trapezoidal or tongue-shaped section 13.
  • the respective electrical connection element 3a, 3b comprises an opening 15, with the respective opening 15 advantageously being in the section of a tongue 13 or in the area 11 is positioned.
  • the opening 15 serves to enlarge the edge of the respective electrical connection element 3a, 3b.
  • connection elements 3a, 3b in the opening 15 can be advantageous (therefore the opening is shown with a broken line).
  • the electrical connection elements 3a, 3b are bonded to one another at the edge by the welding process.
  • the longer edge of the respective electrical connector therefore contributes to a stronger welded connection between the electrical connection elements 3a, 3b.
  • the welded connection 17 is arranged on the edges of the respective electrical connection element 3a, 3b, as indicated on the right-hand side of the figure.
  • FIG 3 shows a vehicle 100 with an energy store 1 .
  • the energy store is advantageous as a traction battery or as a starter battery for vehicle 100 educated.
  • the vehicle 100 is shown here as an automobile, the vehicle 100 can also be in the form of a rail vehicle.
  • the process scheme comprises at least a first step v1, a second step v2 and a third step v3.
  • the printed circuit board (5) is mechanically connected to the respective battery cell 7 in such a way that the electrical connection elements 3a, 3b touch at least in certain areas.
  • a non-positive connection of the electrical connection elements 3a, 3b aligned with one another is also formed.
  • the respective adjacent second electrical connection elements 3b are connected using a (laser) welding process.
  • the contacting second electrical connection elements 3b of adjacent battery cells 7 form a non-positive connection, so that a cohesive (electrical) connection of the second electrical connection elements 3b can be carried out simply and safely using a (laser) welding process.
  • this second step v2 can also take place before the first step v1.
  • a third step v3 the corresponding first electrical connection elements 3a are electrically connected to the corresponding second electrical connection elements 3b.
  • the electrical connection of the first electrical connection element 3a to the second electrical connection element 3b is advantageously carried out using a laser welding process.
  • the temperature sensor 9 is advantageously positioned in such a way that the temperature sensor 9 enters into a direct thermal connection with the first electrical connection element 3a.
  • the invention relates to an energy storage device 1, a method for producing such an energy storage device 1 and a vehicle 100 with such an energy storage device 1.
  • the energy storage device 1 comprises at least one battery cell 7 and a printed circuit board 5, the printed circuit board 5 advantageously being part of a battery pack - Is provided nagement systems and / or for the electrical connection of at least one battery riezelle with external terminals of the energy storage.
  • the printed circuit board includes at least one first electrical connection element 3a, advantageously in the form of a copper bar or copper plate.
  • the respective battery cell 7 comprises a second connection element 3b, generally in the form of an aluminum sheet or an aluminum rail.
  • a welding process in particular a laser welding process, is used for the integral connection of the two electrical connection elements 3a, 3b.
  • a temperature sensor 9 is advantageously in direct thermal contact with the first electrical connection element 3a.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

En résumé, l'invention concerne un accumulateur d'énergie (1), un procédé de fabrication d'un tel accumulateur d'énergie (1) et un véhicule (100) comprenant un tel accumulateur d'énergie (1). L'accumulateur d'énergie (1) comprend au moins une cellule de batterie (7) et une carte de circuit imprimé (5), la carte de circuit imprimé (5) étant avantageusement placée comme partie d'un système de gestion de batterie et/ou destinée à connecter électriquement ladite cellule de batterie (7) à des connexions externes de l'accumulateur d'énergie (1). La carte de circuit imprimé (5) comprend au moins un premier élément de connexion électrique (3a), avantageusement sous la forme d'un rail en cuivre ou sous la forme d'une feuille de cuivre. La cellule de batterie respective comprend un second élément de connexion électrique (3b), généralement sous la forme d'une feuille d'aluminium ou sous la forme d'un rail en aluminium. Un procédé de soudage, en particulier un procédé de soudage au laser, est utilisé pour connecter les deux éléments de connexion électrique (3a, 3b). Un capteur de température (9) est avantageusement en contact thermique direct avec le premier élément de connexion électrique (3a), et par conséquent le capteur de température (9) permet de déterminer la température de la cellule de batterie (7).
PCT/EP2022/081710 2021-11-17 2022-11-14 Accumulateur d'énergie, procédé de fabrication d'un accumulateur d'énergie et véhicule WO2023088818A1 (fr)

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DE102021129965.9A DE102021129965A1 (de) 2021-11-17 2021-11-17 Energiespeicher, Verfahren zur Herstellung eines Energiespeichers sowie Fahrzeug

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EP2337116A2 (fr) * 2008-10-14 2011-06-22 LG Chem, Ltd. Element de raccordement de bornes d'electrodes servant a produire un bloc noyau
US20120190252A1 (en) * 2011-01-25 2012-07-26 Pavlinsky Robert J Rechargeable battery pack including low-resistance battery-pack interconnect
DE102012205910A1 (de) * 2012-04-11 2013-10-17 Elringklinger Ag Zellkontaktierungssystem für eine elektrochemische Vorrichtung und Verfahren zum Herstellen eines Zellkontaktierungssystems
WO2015094035A1 (fr) * 2013-12-17 2015-06-25 Husqvarna Ab Bloc-batterie doté d'un appareil de fixation de cellules
EP3352305A1 (fr) * 2017-01-22 2018-07-25 Tyco Electronics (Shanghai) Co. Ltd. Ensemble de connexion
US20190296313A1 (en) 2018-03-26 2019-09-26 Toyota Jidosha Kabushiki Kaisha Assembled battery and manufacturing method of assembled battery
DE102019127703A1 (de) 2019-11-04 2021-05-06 HELLA GmbH & Co. KGaA Zellverbund, umfassend eine Mehrzahl von Energiespeicherzellen und Verfahren zu dessen Herstellung

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* Cited by examiner, † Cited by third party
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US20190363326A1 (en) 2018-05-22 2019-11-28 GM Global Technology Operations LLC Battery assembly with multi-piece bus bar cap assembly
US11018381B2 (en) 2019-02-26 2021-05-25 GM Global Technology Operations LLC Battery module with interconnect board assembly having integrated cell sense PCB-flex circuit hardware

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2337116A2 (fr) * 2008-10-14 2011-06-22 LG Chem, Ltd. Element de raccordement de bornes d'electrodes servant a produire un bloc noyau
US20120190252A1 (en) * 2011-01-25 2012-07-26 Pavlinsky Robert J Rechargeable battery pack including low-resistance battery-pack interconnect
DE102012205910A1 (de) * 2012-04-11 2013-10-17 Elringklinger Ag Zellkontaktierungssystem für eine elektrochemische Vorrichtung und Verfahren zum Herstellen eines Zellkontaktierungssystems
WO2015094035A1 (fr) * 2013-12-17 2015-06-25 Husqvarna Ab Bloc-batterie doté d'un appareil de fixation de cellules
EP3352305A1 (fr) * 2017-01-22 2018-07-25 Tyco Electronics (Shanghai) Co. Ltd. Ensemble de connexion
US20190296313A1 (en) 2018-03-26 2019-09-26 Toyota Jidosha Kabushiki Kaisha Assembled battery and manufacturing method of assembled battery
DE102019127703A1 (de) 2019-11-04 2021-05-06 HELLA GmbH & Co. KGaA Zellverbund, umfassend eine Mehrzahl von Energiespeicherzellen und Verfahren zu dessen Herstellung

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DE102021129965A1 (de) 2023-05-17

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